Question

VA ROOOOOOGGGG
AM NEVOIEEEEE URGENTTTTTT
DAU COROANAAAAAA
4

Answer 1

Răspuns:

MNa=23g/mol

n=m/M=4,6/23=0,2moli Na

2moli........................................1mol

2Na  +  2H2O   →  2NaOH + H2↑

0,2moli.........................................xmoli

x=0,2x1/2=0,1moli H2

calculam in grame

MNaOH=23+16+1=40g/mol

2x23g.......................2x40g

2Na  +  2H2O   →  2NaOH + H2↑

4,6g............................yg

y=4,6x2x40/2x23=8g NaOH

Explicație: